/**
 * Copyright (c) 2012-2017, www.tinygroup.org (luo_guo@icloud.com).
 * <p>
 * Licensed under the GPL, Version 3.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 * <p>
 * http://www.gnu.org/licenses/gpl.html
 * <p>
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */
package org.tinygroup.template.function;

import org.tinygroup.template.Template;
import org.tinygroup.template.TemplateContext;
import org.tinygroup.template.TemplateException;

/**
 * Created by luoguo on 2014/6/9.
 */
public class InstanceOfTemplateFunction extends AbstractTemplateFunction {


    public InstanceOfTemplateFunction() {
        super("is,instanceOf,instance");
    }


    public Object execute(Template template, TemplateContext context, Object... parameters) throws TemplateException {
        Object object = parameters[0];

        for (int i = 1; i < parameters.length; i++) {
            Object parameter = parameters[i];
            if (parameter instanceof Class) {
                //如果后面是类型
                Class clazz = (Class) parameter;
                if (clazz.isInstance(object)) {
                    return true;
                }
            } else if (parameter instanceof String) {
                //如果是字符串
                try {
                    Class clazz = Class.forName((String) parameter);
                    if (clazz.isInstance(object)) {
                        return true;
                    }
                } catch (ClassNotFoundException e) {
                    throw new TemplateException(e);
                }
            } else {
                notSupported(parameters);
            }
        }
        return false;
    }

}

